<template>
  <view class="main">
    <!-- 内容列表 -->
    <scroll-view scroll-y class="viewport">
      <!-- 购物车列表 -->
      <template v-if="userStore.profile.token">
        <!-- 优惠提示 -->
        <view class="tips">
          <text class="label">满减</text>
          <text class="desc">满1件, 即可享受9折优惠</text>
        </view>
        <view class="blank" v-show="onShow">
          购物车还是空的，快来挑选好货吧
        </view>
        <!-- 购物车商品 -->
        <view class="carts">
          <uni-swipe-action>
            <uni-swipe-action-item
              class="swipe-cell"
              v-for="item in list"
              :key="item.skuId"
            >
              <navigator
                hover-class="none"
                :url="'/pages/goods/index?id=' + item.id"
                class="card"
              >
                <text
                class="checkbox"
                :class="[`icon-${item.selected ? 'checked' : 'ring'}`]"
                @click.prevent="submitList(item.skuId,!item.selected)"
                ></text>
                <!-- 商品缩略图 -->
                <image class="thumb" :src="item.picture"></image>
                <view class="meta">
                  <!-- 商品名称 -->
                  <view class="name ellipsis">{{ item.name }}</view>
                  <!-- 商品类型 -->
                  <view class="type ellipsis">{{ item.attrsText }}</view>
                  <!-- 价格 -->
                  <view class="price"> ¥{{ item.price }} </view>
                  <!-- 商品数量，阻止冒泡 -->
                  <view class="quantity" @tap.stop="() => {}">
                     <uni-number-box
                     @change="onCountChange($event, item.skuId)" 
                      v-model="item.count"
                      :min="1"
                      :max="item.stock"                    
                    />
                  </view>
                </view>
              </navigator>

              <template v-slot:right>
                <view class="swipe-cell-action">
                  <button class="delete-button" @click="onDelete(item.skuId)">删除</button>
                </view>
              </template>
            </uni-swipe-action-item>
          </uni-swipe-action>
        </view>
      </template>
      <view class="blank" v-else>
        <text>登后后可查看购物车中的商品</text>
        <navigator url="/pages/login/login" hover-class="none">
          <button class="button">去登录</button>
        </navigator>
      </view>
      <!-- 状态提示 -->
    </scroll-view>

    <!-- 底部操作栏 -->
    <view class="toolbar" v-if="userStore.profile.token">
      <text class="all" @click="checkedData" :class="{ checked: checkedListShow }">全选</text>
      <text class="text">合计:</text>
      <text class="amount">{{ totarprice}}</text>
      <!-- 操作按钮 -->
      <view class="buttons">
        <view class="button payment" :class="{ disabled: totarCount.length===0 }" @click="onGoPay">
          去结算({{ totarCount }})
        </view>
      </view>
    </view>
  </view>
</template>
<script setup>
import { getCartsAPI,updateCartAPI,memberCartSelected,delCartByIdAPI} from '@/api/cart'
import { onShow } from '@dcloudio/uni-app';
import { ref, computed } from "vue";
// pinia
import  { useUserStore } from "@/store";
const userStore = useUserStore()

// 渲染列表
const list = ref([])// 渲染页面

//#region  购物车列表
const getCarts = async() => {
  const { result } = await getCartsAPI()
  console.log(result);
  list.value = result

}
//#endregion

//#region   首次渲染
onShow(() => {
  getCarts()
})
//#endregion

//#region  商品切换选中
const submitList = async(skuId,selected) => {
  await updateCartAPI(skuId, { selected })
  getCarts()
}
//#endregion

//#region  筛选出,所有已经勾选了商品 组成新的数组
const checkedList = computed(() => {
  return list.value.filter(v => v.selected)
})
//#endregion

//#region  根据小商品的选中状态来计算 全选的状态 
const checkedListShow = computed(() => {
  return list.value.length && checkedList.value.length === list.value.length
})
//#endregion

//#region  全选影响小选
const checkedData = async() => {
  const checked = !checkedListShow.value;
  await memberCartSelected(checked)
  getCarts()
}
//#endregion

//#region  统计总价格
const totarprice = computed(() => {
   return checkedList.value.reduce((a,b)=>a+b.nowPrice*b.count,0)
})
//#endregion

//#region  统计个数
const totarCount = computed(() => {
   return checkedList.value.reduce((a,b)=>a+b.count,0)
})
//#endregion

//#region  数量 ++ --的编辑
const onCountChange = async (count, skuId) => {
  await updateCartAPI(skuId, { count })
  getCarts()
}
//#endregion

//#region  删除功能
const onDelete = async(skuId) => {
  const { confirm } = await uni.showModal({ title: '提示', content: "您确定要删除吗" })
  if (confirm) {
    await delCartByIdAPI([skuId])
    getCarts()
  }
}
//#endregion

//#region  跳转支付页面
const onGoPay = (e) => {


  
      if (!totarCount.value) {
        return uni.showToast({ title: "请至少选择一项商品" });
      }
      //  添加到文档上
      uni.navigateTo({ url: "/pages/order/create/index" });
   
}
//#endregion

 </script>
<style lang="scss">
page {
  background-color: #f7f7f8;
  height: 100%;
}
.main {
  height: 100%;
  display: flex;
  flex-direction: column;
}
.viewport {
  min-height: 400rpx;
}
/* 顶部工具栏 */
.topbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  height: 88rpx;
  padding: 0 30rpx;
  font-size: 26rpx;
  color: #262626;
  background-color: #fff;
  .extra {
    display: flex;
    align-items: center;
    height: 24rpx;
    border-left: 1rpx solid #bfbfbf;
    .edit {
      padding: 0 30rpx;
    }
    .menu {
      width: 9rpx;
      height: 9rpx;
      padding: 14rpx;
      border-radius: 50%;
      background-color: #262626;
      background-clip: content-box;
      position: relative;
      &::before {
        left: 0;
      }
      &::after {
        right: 0;
      }
    }
  }
}
.topbar .extra .menu::before,
.topbar .extra .menu::after {
  position: absolute;
  top: 50%;
  content: "";
  width: 6rpx;
  height: 4rpx;
  background-color: #8c8c8c;
  transform: translateY(-50%);
  border-radius: 4rpx;
}
/* 优惠提示 */
.tips {
  display: flex;
  align-items: center;
  line-height: 1;
  padding: 30rpx;
  font-size: 26rpx;
  color: #666;
  .label {
    color: #fff;
    padding: 7rpx 15rpx 5rpx;
    border-radius: 4rpx;
    font-size: 24rpx;
    background-color: #27ba9b;
    margin-right: 10rpx;
  }
}
.carts {
  padding: 0 20rpx;
  .card {
    display: flex;
    padding: 20rpx 20rpx 20rpx 80rpx;
    border-radius: 10rpx;
    background-color: #fff;
    position: relative;
    .checkbox {
      position: absolute;
      top: 0;
      left: 0;
      display: flex;
      align-items: center;
      justify-content: center;
      width: 80rpx;
      height: 100%;
      font-size: 40rpx;
      color: #444;
    }
    .icon-checked {
      color: #27ba9b;
    }
    .thumb {
      width: 170rpx;
      height: 170rpx;
    }
    .meta {
      flex: 1;
      display: flex;
      flex-direction: column;
      justify-content: space-between;
      margin-left: 20rpx;
    }
    .name {
      height: 72rpx;
      font-size: 26rpx;
      color: #444;
    }
    .type {
      line-height: 1.8;
      padding: 0 15rpx;
      font-size: 24rpx;
      align-self: flex-start;
      border-radius: 4rpx;
      color: #888;
      background-color: #f7f7f8;
    }
    .price {
      line-height: 1;
      font-size: 26rpx;
      color: #444;
      margin-bottom: 2rpx;
    }
    .warning {
      color: #cf4444;
      font-size: 24rpx;
    }
    .quantity {
      position: absolute;
      bottom: 20rpx;
      right: 5rpx;
      display: flex;
      justify-content: space-between;
      align-items: center;
      width: 220rpx;
      height: 48rpx;
      .text {
        height: 100%;
        padding: 0 20rpx;
        font-size: 32rpx;
        color: #444;
      }
      .input {
        height: 100%;
        text-align: center;
        border-radius: 4rpx;
        font-size: 24rpx;
        color: #444;
        background-color: #f6f6f6;
      }
    }
  }
  .swipe-cell {
    display: block;
    margin-top: 20rpx;
    &:first-child {
      margin-top: 0;
    }
  }
}
/* 购物车商品 */
/* 购物车状态提示 */
.blank {
  padding: 100rpx 0 60rpx;
  text-align: center;
  color: #444;
  font-size: 26rpx;
  .button {
    width: 240rpx !important;
    height: 60rpx;
    line-height: 60rpx;
    margin-top: 25rpx;
    font-size: 26rpx;
    border-radius: 60rpx;
    color: #fff;
    background-color: #27ba9b;
    &::after {
      display: none;
    }
  }
}
/* 吸底工具栏 */
.toolbar {
  position: relative;
  padding: 32rpx 20rpx 28rpx;
  border-top: 1rpx solid #ededed;
  border-bottom: 1rpx solid #ededed;
  background-color: #fff;
  .all {
    margin-left: 25rpx;
    font-size: 14px;
    color: #444;
    &::before {
      font-family: "erabbit" !important;
      content: "\e6cd";
      font-size: 36rpx;
      margin-right: 8rpx;
      vertical-align: -4rpx;
    }
  }
  .checked {
    &::before {
      content: "\e6cc";
      color: #27ba9b;
    }
  }
  .text {
    margin-right: 8rpx;
    margin-left: 32rpx;
    color: #444;
    font-size: 14px;
  }
  .amount {
    font-size: 20px;
    color: #cf4444;
    vertical-align: -1px;
    &::before {
      content: "￥";
      font-size: 12px;
    }
    .decimal {
      font-size: 12px;
    }
  }
  .buttons {
    position: absolute;
    right: 10rpx;
    top: 50%;
    display: flex;
    justify-content: space-between;
    text-align: center;
    line-height: 72rpx;
    font-size: 13px;
    color: #fff;
    transform: translateY(-50%);
    .button {
      width: 240rpx;
      margin: 0 10rpx;
      border-radius: 72rpx;
    }
  }
  .payment {
    background-color: #27ba9b;
  }
  .disabled {
    opacity: 0.6;
  }
  .delete {
    display: none;
    background-color: #27ba9b;
  }
  .collect {
    display: none;
    background-color: #ffa868;
  }
}
.swipe-cell-action {
  display: flex;
  height: 100%;
  button {
    display: flex;
    justify-content: center;
    align-items: center;
    width: 50px;
    padding: 6px;
    line-height: 1.5;
    color: #fff;
    font-size: 26rpx;
    border-radius: 0;
  }
  .collect-button {
    background-color: #ffa868;
  }
  .delete-button {
    background-color: #cf4444;
  }
}
</style>